Gantry crane with anti-shaking lifting appliance

The utility model relates to a gantry crane with an anti-shaking lifting appliance. The double-girder non-overhang portal crane comprises a portal crane trolley, wherein steel wire ropes are respectively connected to four corners of a lifting appliance of the portal crane trolley; pulleys are arranged at the four corners of the crane trolley correspondingly, pulleys are fixed to the left side andthe right side of the upper surface of the crane main beam correspondingly, and heavy hammer limiting blocks are installed on the left side face and the right side face of the crane main beam correspondingly. Wherein the steel wire rope sequentially penetrates through a pulley on the crane trolley, a pulley on the main beam and a limiting block mounted on the main beam, and heavy hammers are connected to the tail ends of the steel wire rope; wherein a protective barrel is arranged on the outer side surface of each supporting leg of the crane, and the heavy hammer is sleeved in the protective barrel; the four heavy ham